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Potential Snow 11/27 - 11/28


NEG NAO

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That snowfall map is strange, it has more snow for central NJ than the city and L.I. It looks like it is bring too much ocean air into the coast, which is odd sicne the surface winds are from the North to Northeast during the event. I would expect that the city and L.I. would get more and central NJ would get less. A 1"-4"on the grass would be my best estimate for the area.

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The snowfall maps were pulling the same crap for the 11/7 event, too. Long Island is not a hot island of gas. There is no strong onshore flow to create temperatures that much warmer than places just west of NYC. In this setup, the ocean -- all else being equal -- would make amounts slightly less, but not THAT much less.

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Upton thinks all snow for central nassau county...my point and click.

  • A chance of snow, mainly after 4am. Mostly cloudy, with a low around 34. Calm wind becoming north 5 to 7 mph in the evening. Chance of precipitation is 30%.
  • Tuesday Periods of snow, mainly after 7am. High near 38. Light and variable wind becoming north 5 to 8 mph in the morning. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
  • Tuesday Night Periods of snow, mainly before 10pm. Low around 32. North wind around 9 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

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I have to admit being somewhat mystified by the degree of the warmup many of the models (including the latest 0z RGEM) seem to be indicating. It seems that whatever cold air is currently in place will quickly be eroded as marine air engulfs the immediate coast. I didn't buy it when I saw a few models show it the other day...but with less than 12 hours to go and it still showing up on some models...it is very troubling to say the least.

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I have to admit being somewhat mystified by the degree of the warmup many of the models (including the latest 0z RGEM) seem to be indicating. It seems that whatever cold air is currently in place will quickly be eroded as marine air engulfs the immediate coast. I didn't buy it when I saw a few models show it the other day...but with less than 12 hours to go and it still showing up on some models...it is very troubling to say the least.

This is the problem with November snows around here, you need dynamic lows which we had two weeks ago and not this time, although one can argue the Thanksgiving 1989 storm was not the most dynamic storm ever.

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